package com.pwser.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;

import com.pwser.filter.MyFilterSecurityInterceptor;
import com.pwser.handler.MyAccessDeniedHandler;
import com.pwser.handler.MyAuthenticationFailureHandler;
import com.pwser.service.LoginService;

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
	
	@Autowired
	private LoginService loginService;
	
	@Autowired
	private MyFilterSecurityInterceptor myFilterSecurityInterceptor;
	
	@Autowired
	private MyAccessDeniedHandler myAccessDeniedHandler;
	
	@Autowired
	private MyAuthenticationFailureHandler myAuthenticationFailureHandler;
	
	//不需要过滤的路径
	private static final String[] exclusivePaths = {"/", "/login", "/logout", "/webjars/**", "/css/**", "/js/**", "/fonts/**", "/favicon.ico"};
	
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        //定制请求的授权规则
        http.authorizeRequests().antMatchers(exclusivePaths).permitAll().anyRequest().authenticated();

        //开启自动配置的登陆功能，效果，如果没有登陆，没有权限就会来到登陆页面
        http.formLogin().usernameParameter("login_account").passwordParameter("login_pass")
                .loginPage("/login").defaultSuccessUrl("/main.html", true)
                .failureUrl("/login?error=true").failureHandler(myAuthenticationFailureHandler);
        //1、/login来到登陆页
        //2、重定向到/login?error表示登陆失败
        //3、更多详细规定
        //4、默认post形式的 /login代表处理登陆
        //5、一但定制loginPage；那么 loginPage的post请求就是登陆


        //开启自动配置的注销功能。
        http.logout().logoutSuccessUrl("/");//注销成功以后来到首页
        //1、访问 /logout 表示用户注销，清空session
        //2、注销成功会返回 /login?logout 页面；

        //开启记住我功能
        http.rememberMe().rememberMeParameter("remeber");
        //登陆成功以后，将cookie发给浏览器保存，以后访问页面带上这个cookie，只要通过检查就可以免登录
        //点击注销会删除cookie
        
        //http.addFilterBefore(myFilterSecurityInterceptor, FilterSecurityInterceptor.class);
        
        //关闭csrf并使用自己异常页面
        http.csrf().disable().exceptionHandling().accessDeniedHandler(myAccessDeniedHandler);
        
        //maximumSessions设置用户只能登陆一次，多次登陆会覆盖前一个session
        //maxSessionsPreventsLogin超出登陆限制后是否报错
        //expiredUrl超出登陆限制后跳转的地址
        http.sessionManagement().maximumSessions(1).maxSessionsPreventsLogin(false).expiredUrl("/login?expired");
    }

    //定义认证规则
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
//        auth.inMemoryAuthentication()
//                .withUser("zhangsan").password("123456").roles("VIP1","VIP2")
//                .and()
//                .withUser("lisi").password("123456").roles("VIP2","VIP3")
//                .and()
//                .withUser("wangwu").password("123456").roles("VIP1","VIP3");
    	auth.userDetailsService(loginService).passwordEncoder(new BCryptPasswordEncoder());

    }
}
